His fear of dog is a(n) "conditioned response."
In classical conditioning, the conditioned response it refers to to the already neutral stimulus. For instance, how about we assume that the scent of sustenance is an unconditioned boost, a sentiment hunger in light of the scent is an unconditioned reaction, and the sound of a whistle when you notice the nourishment is the adapted jolt. The molded reaction would feel hungry when you heard the sound of the shriek.